An acre of farmland might be worth $2500 or $5000, and that land has been improved by clearing, draining, fencing, etc. (improvements done by the current or an earlier owner or his tenant). LVT is based on the UNIMPROVED value of the land, so if there were an as-yet-uncleared acre nearby, it and the acre of farmland would be assessed at the same value.
An acre in midtown Manhattan might be worth $250 million to as much as $1.25 billion, before we look at the building that is on it. (An acre is a big lot in Manhattan -- a whole city block.) A tiny lot in Manhattan sells hundreds of thousands of dollars, due to its location, which the seller didn't create. The old building on it may be worth nothing.
And the 100x100 lot with a new hotel on it and the 100x100 lot next door with just a parking lot, or maybe just a chain link fence, would be assessed identically. The unimproved value of the land.
Farmers would pay little under LVT. In fact they'd be advantaged, because their buildings and equipment would not be taxed. The owners of sites in our major cities would pay in proportion to the value of their site. And frequently the land is already leased to someone who puts a building on it, which gives a sense of the value of the land at the time the lease was negotiated -- a value which is not always made public.
And why would we want to tax wages, or sales, if we could obtain from the value of land much of the revenue we need, while providing a boost to the economy via removing the deadweight loss of dumb taxes?